<?php
/**
 * Smarty Internal Plugin Resource String
 *
 * @package Smarty
 * @subpackage TemplateResources
 * @author Uwe Tews
 * @author Rodney Rehm
 */

/**
 * Smarty Internal Plugin Resource String
 *
 * Implements the strings as resource for Smarty template
 *
 * {@internal unlike eval-resources the compiled state of string-resources is
 * saved for subsequent access}}
 *
 * @package Smarty
 * @subpackage TemplateResources
 */
class Smarty_Internal_Resource_String extends Smarty_Resource {
	
	/**
	 * populate Source Object with meta data from Resource
	 *
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @param $_template Smarty_Internal_Template
	 *       	 template object
	 * @return void
	 */
	public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
		$source->uid = $source->filepath = sha1 ( $source->name );
		$source->timestamp = 0;
		$source->exists = true;
	}
	
	/**
	 * Load template's source from $resource_name into current template object
	 *
	 * @uses decode() to decode base64 and urlencoded template_resources
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @return string template source
	 */
	public function getContent(Smarty_Template_Source $source) {
		return $this->decode ( $source->name );
	}
	
	/**
	 * decode base64 and urlencode
	 *
	 * @param $string string
	 *       	 template_resource to decode
	 * @return string decoded template_resource
	 */
	protected function decode($string) {
		// decode if specified
		if (($pos = strpos ( $string, ':' )) !== false) {
			if (! strncmp ( $string, 'base64', 6 )) {
				return base64_decode ( substr ( $string, 7 ) );
			} elseif (! strncmp ( $string, 'urlencode', 9 )) {
				return urldecode ( substr ( $string, 10 ) );
			}
		}
		
		return $string;
	}
	
	/**
	 * modify resource_name according to resource handlers specifications
	 *
	 * @param $smarty Smarty
	 *       	 Smarty instance
	 * @param $resource_name string
	 *       	 resource_name to make unique
	 * @return string unique resource name
	 */
	protected function buildUniqueResourceName(Smarty $smarty, $resource_name) {
		return get_class ( $this ) . '#' . $this->decode ( $resource_name );
	}
	
	/**
	 * Determine basename for compiled filename
	 *
	 * Always returns an empty string.
	 *
	 * @param $source Smarty_Template_Source
	 *       	 source object
	 * @return string resource's basename
	 */
	protected function getBasename(Smarty_Template_Source $source) {
		return '';
	}

}

?>